| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.qjournal.server; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| |
| import javax.servlet.ServletContext; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSUtil; |
| import org.apache.hadoop.hdfs.server.common.JspHelper; |
| import org.apache.hadoop.http.HttpConfig; |
| import org.apache.hadoop.http.HttpServer2; |
| import org.apache.hadoop.net.NetUtils; |
| |
| /** |
| * Encapsulates the HTTP server started by the Journal Service. |
| */ |
| @InterfaceAudience.Private |
| public class JournalNodeHttpServer { |
| public static final String JN_ATTRIBUTE_KEY = "localjournal"; |
| |
| private HttpServer2 httpServer; |
| private final JournalNode localJournalNode; |
| |
| private InetSocketAddress httpAddress; |
| private InetSocketAddress httpsAddress; |
| private final InetSocketAddress bindAddress; |
| |
| private final Configuration conf; |
| |
| JournalNodeHttpServer(Configuration conf, JournalNode jn, |
| InetSocketAddress bindAddress) { |
| this.conf = conf; |
| this.localJournalNode = jn; |
| this.bindAddress = bindAddress; |
| } |
| |
| void start() throws IOException { |
| final InetSocketAddress httpAddr = bindAddress; |
| |
| final String httpsAddrString = conf.get( |
| DFSConfigKeys.DFS_JOURNALNODE_HTTPS_ADDRESS_KEY, |
| DFSConfigKeys.DFS_JOURNALNODE_HTTPS_ADDRESS_DEFAULT); |
| InetSocketAddress httpsAddr = NetUtils.createSocketAddr(httpsAddrString); |
| |
| if (httpsAddr != null) { |
| // If DFS_JOURNALNODE_HTTPS_BIND_HOST_KEY exists then it overrides the |
| // host name portion of DFS_NAMENODE_HTTPS_ADDRESS_KEY. |
| final String bindHost = |
| conf.getTrimmed(DFSConfigKeys.DFS_JOURNALNODE_HTTPS_BIND_HOST_KEY); |
| if (bindHost != null && !bindHost.isEmpty()) { |
| httpsAddr = new InetSocketAddress(bindHost, httpsAddr.getPort()); |
| } |
| } |
| |
| HttpServer2.Builder builder = DFSUtil.httpServerTemplateForNNAndJN(conf, |
| httpAddr, httpsAddr, "journal", |
| DFSConfigKeys.DFS_JOURNALNODE_KERBEROS_INTERNAL_SPNEGO_PRINCIPAL_KEY, |
| DFSConfigKeys.DFS_JOURNALNODE_KEYTAB_FILE_KEY); |
| |
| httpServer = builder.build(); |
| httpServer.setAttribute(JN_ATTRIBUTE_KEY, localJournalNode); |
| httpServer.setAttribute(JspHelper.CURRENT_CONF, conf); |
| httpServer.addInternalServlet("getJournal", "/getJournal", |
| GetJournalEditServlet.class, true); |
| httpServer.start(); |
| |
| HttpConfig.Policy policy = DFSUtil.getHttpPolicy(conf); |
| int connIdx = 0; |
| if (policy.isHttpEnabled()) { |
| httpAddress = httpServer.getConnectorAddress(connIdx++); |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_HTTP_ADDRESS_KEY, |
| NetUtils.getHostPortString(httpAddress)); |
| } |
| |
| if (policy.isHttpsEnabled()) { |
| httpsAddress = httpServer.getConnectorAddress(connIdx); |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_HTTPS_ADDRESS_KEY, |
| NetUtils.getHostPortString(httpsAddress)); |
| } |
| } |
| |
| void stop() throws IOException { |
| if (httpServer != null) { |
| try { |
| httpServer.stop(); |
| } catch (Exception e) { |
| throw new IOException(e); |
| } |
| } |
| } |
| |
| /** |
| * Return the actual HTTP/HTTPS address bound to by the running server. |
| */ |
| public InetSocketAddress getAddress() { |
| assert httpAddress != null || httpsAddress != null; |
| return httpAddress != null ? httpAddress : httpsAddress; |
| } |
| |
| /** |
| * Return the actual address bound to by the running server. |
| */ |
| public InetSocketAddress getHttpAddress() { |
| return httpAddress; |
| } |
| |
| /** |
| * Return the actual address bound to by the running server. |
| */ |
| public InetSocketAddress getHttpsAddress() { |
| return httpsAddress; |
| } |
| |
| /** |
| * Return the URI that locates the HTTP server. |
| */ |
| URI getServerURI() { |
| // getHttpClientScheme() only returns https for HTTPS_ONLY policy. This |
| // matches the behavior that the first connector is a HTTPS connector only |
| // for HTTPS_ONLY policy. |
| InetSocketAddress addr = httpServer.getConnectorAddress(0); |
| return URI.create(DFSUtil.getHttpClientScheme(conf) + "://" |
| + NetUtils.getHostPortString(addr)); |
| } |
| |
| public static Journal getJournalFromContext(ServletContext context, String jid) |
| throws IOException { |
| JournalNode jn = (JournalNode)context.getAttribute(JN_ATTRIBUTE_KEY); |
| return jn.getOrCreateJournal(jid); |
| } |
| |
| public static Configuration getConfFromContext(ServletContext context) { |
| return (Configuration) context.getAttribute(JspHelper.CURRENT_CONF); |
| } |
| } |